Patttxtt



e. F. Hom. BRAKE LINING. AFPUCATION FILED OCT. 25| 1918-,

1, 3 1 9,001 Patnted Oat. 1.4, 1919.l

wi'TN assis :NvEN-ron lines @we and g/-/y,

srarns PATENT o ion.

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Specicationof Letters Patent.

Patented Get. 14, 1919.

Application ed October 26, 1918. Serial No. 259,824.

To @ZZ whom it mag/concern.'

Be it known that I, GEORGE FRANCIS HOL-- Lis, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new andi useful Improvements in Brake-'Linings, of which the following is a specification. i

This invention relates to improvements in linings for braking devices, and more particularly to that type of brakes comprising a drum and tension band.

The primary object of this invention is to provide a lining for friction brakes composed of non-combustible material such as asbestos, which is so woven and constructed as to insure an equal distribution of the lubricant to the gripping surface of the lining and thus lubricate the entire surface of the drum while in motion.

In my co-pending application, Serial N o. 152,499, tiled March 6, 1917, the gripping surface of the lining is formed by the corrugations extending entirely across the face ofv the lining, While in the improved form the raised gripping surfaces extend only partially across the face of the lining to permit the passage of the lubricant on the face of the lining from one raised portion to the other.

Other objects of this invention are to provide a brake lining of the type specified which is simple in its construction, strong, durable and efficientJ in its use, and inexpensive to manufacture.

To the accomplishment of these and such ctherobjects as may hereinafter appear, the invention consists of the novel construction herein specifically described and illustrated in the accompanying drawing wherein is shown an embodiment of theinvention.

In the drawing, forming a portion of this specification and wherein like numerals of reference designate corresponding paras throughout the several views: Figure l a face view of the preferred form of my' nnproved brake lining, and Fig. 2 is a .cross sectional view on line Fig. 1. Figs. 3 and 5 are slightly modified forms of linings, and 4C and 6 cross sectional viewson respectively, of Figs. 3 and Referring more in detail to the drawing s shown in Fig. 1, the brake lin' l ed with the transversely extending portions forming the gripping surthe advantages of the -method of operation will be readily appar- Ation may be resorted to faces 2, which are arranged at regularly spaced intervals in the face of the lining 1.. The lining l with the raised gripping surfaces 2 are homogeneous in construction and may be fabricated from any suitable mate-- be reinforced by thev gripping portions 2 do In the niodications'shown in Figs-3 and i 5, the raised grippingportions 3 extend lon-l gitudinally along the edges of the linin which as shown in Fig. 5, may in addition be provided with the alternately staggered transversely extending raised gripping portions 5. The advantages of this construction in addition to those enumerated above are that it will prevent the `seepage of the lubricant from'the brake lining.

When rivets are used for attaching a' brake lining of my improved construction to the tension band they are positioned intermediate the raised-gripping ortions and thus the head ofthe rivet will e prevented from scoring the face of the drum when thev brake lining; is in frictional engagement therewith.

-F rom the foregoing description, takenin connection with the accompanying drawing, construction and the ent to those skilled in the art to which the 1nvention appertains, principle of operation together with the device Which is now considered to be the best embodiment thereof, it is to be understood that the device shown is merely illustrative and that various changes portion and the minor details of construc- Without departing from the principle or sacricinoany of the advanta es of the invention as defined in the appndea claims.

in the form, pro-y and while describing the hat I claim as new and desire to secure -by Letters Patent is:

v 1. A brake lining woven of homogeneous material, and provided with raised waarin iloportions extending partially across the face:

e Lemons of the brake lining and positioned in staggered relation with respect to'eaoh other, as shown and described. l

2. As an article of manufacture, a brake lining having alternately staggered raised gripping surfaces extending partially across the face of the brake lining, the entire lining being homogeneous.

3. As an article of manufacture, a brake lining woven of homogeneous material having raised gripping surfaces extending longtudnally along the edge of the lining and raised gripping surfaces alternately staggered and extending transversely across a portion of the face of the brake lining.

In testimony whereof I ailix my signature in the presence of two witnesses` GEORGE FRANCIS HOLLIS.

Witnesses z JENNIE JONES, R. CLEMENT WEBER. 

